Muscle Contractions Video Lessons

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Problem: Which step of cross-bridge cycling is considered the power stroke?A. when the myosin cross-bridge formsB. when the phosphate is released and the myosin cross-bridge moves to the right in the animationC. when ATP binds to the myosin head and releases it from the thin filamentD. when ATP is hydrolyzed and the myosin head moves to the left in the animation

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Problem Details

Which step of cross-bridge cycling is considered the power stroke?

A. when the myosin cross-bridge forms

B. when the phosphate is released and the myosin cross-bridge moves to the right in the animation

C. when ATP binds to the myosin head and releases it from the thin filament

D. when ATP is hydrolyzed and the myosin head moves to the left in the animation

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Based on our data, we think this problem is relevant for Professor Batista's class at SMU.